. Department bulletin. Agriculture; Agriculture. Washington, D. C. T May 10, 1923 MIGRATION RECORDS FROM WILD DUCKS AND OTHER BIRDS BANDED IN THE SALT LAKE VALLEY, UTAH. By Alexander Wetmore, Assistant Biologist, Division of Biological Investigations, Bureau of Biological Survey. CONTENTS. Page. Introduction 1 Migration and occurrence records 3 Mallard 4 Gadwall 5 Green-winged teal -*L 6 Page. Cinnamon teal Shoveler, or spoonbill 7 Pintail 9 Redhead 11 Other birds 13 INTRODUCTION. The Bear Eiver marshes at the north end of Great Salt Lake, Utah (PL I, Fig. 1). a region highly attractive to wil
. Department bulletin. Agriculture; Agriculture. Washington, D. C. T May 10, 1923 MIGRATION RECORDS FROM WILD DUCKS AND OTHER BIRDS BANDED IN THE SALT LAKE VALLEY, UTAH. By Alexander Wetmore, Assistant Biologist, Division of Biological Investigations, Bureau of Biological Survey. CONTENTS. Page. Introduction 1 Migration and occurrence records 3 Mallard 4 Gadwall 5 Green-winged teal -*L 6 Page. Cinnamon teal Shoveler, or spoonbill 7 Pintail 9 Redhead 11 Other birds 13 INTRODUCTION. The Bear Eiver marshes at the north end of Great Salt Lake, Utah (PL I, Fig. 1). a region highly attractive to wild ducks and other "waterfowl, are known as one of the great centers where such birds gather in the West, so that information regarding the migratory movements of the large numbers of birds that visit this region is of interest and importance. In the period from 1914 to 1916, the writer, while engaged in the study of an alkali poisoning prevalent among waterfowl in the Salt Lake marshes, had opportunity to band and release a considerable number of ducks and other birds (PI. I, Fig. 2), a fair proportion of which were killed subsequently in other regions. Reports already publishedx have dealt with the so-called duck sickness, and have detailed methods by which a considerable number of the birds affected were cured. Before such individuals were set at liberty each was marked with a numbered band, and record made 1 Reports made on the author's investigations of the duck sickness in Utah are con- tained in bulletins of the United States Department of Agriculture as follows : No. 217, Mortality among Waterfowl around Great Salt Lake, Utah (Preliminary Report), 10 p., 3 pis., 1915 ; and No. 672, The Duck Sickness in Utah, 25 p., 4 pis,, 1918. Other reports based in part on investigations then made are contained in Bulletin No. 793, Lead Poisoning in Waterfowl, 12 p., 2 pis., 1919 ; and No. 936, Wild Ducks and Duck Foods of the Bear River Marshes, Utah, 20 p., 4 pis., 1921. Note.
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